package com.xxxx.server.config.security;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;

import java.util.Collection;

/**
 * 权限控制，根据用户判断角色

 */
@Component
public class CustomUrlAccessDecisionManager implements AccessDecisionManager {

	@Override
	public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {
		for (ConfigAttribute configAttribute : configAttributes) {
			//当前url所需要的角色
			String needRole = configAttribute.getAttribute();
			if ("ROLE_LOGIN".equals(needRole)){
				if (authentication instanceof AnonymousAuthenticationToken){
					throw new AccessDeniedException("尚未登录，请登录");
				}else {
					return;
				}
			}
			//判断用户角色是否为url所需角色
			Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
			for (GrantedAuthority authority : authorities) {
				if (authority.getAuthority().equals(needRole)){
					return;
				}
			}
		}
		throw new AccessDeniedException("权限不足，请联系管理员");
	}

	@Override
	public boolean supports(ConfigAttribute attribute) {
		return false;
	}

	@Override
	public boolean supports(Class<?> clazz) {
		return false;
	}
}
